<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolesList" border row-key="id">
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="i1"
            >
              <!-- 一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row, item1.id)"
                  >{{ item1.authName }}</el-tag
                >
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套渲染二级权限 -->
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="i2"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      v-for="(item3, i3) in item2.children"
                      :key="i3"
                      type="warning"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button type="primary" size="mini" icon="el-icon-edit"
              @click="showEdit(scope.row)">编辑</el-button
            >
            <el-button type="danger" size="mini" icon="el-icon-delete"
              @click="deleteRole(scope.row)">删除</el-button
            >
            <el-button
              type="warning"
              size="mini"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <el-tree
        :data="rightsList"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRight">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 添加权限对话框 -->
     <!-- 添加角色的对话框 -->
      <el-dialog
        title="添加角色"
        :visible.sync="addDialogVisible"
        width="30%"
        @close="addDialogVisible = false"
      >
        <!-- 内容主体区域 -->
        <el-form
          ref="addFormRef"
          :model="addForm"
          :rules="addFormRules"
          label-width="70px"
        >
          <el-form-item label="角色名" prop="roleName">
            <el-input v-model="addForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述" prop="roleDesc">
            <el-input type="textarea" v-model="addForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <!-- 底部区域 -->
        <span slot="footer" class="dialog-footer">
          <el-button @click="addDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addRole">确 定</el-button>
        </span>
      </el-dialog>
      <!-- 编辑角色对话框 -->
       <el-dialog
        title="编辑角色"
        :visible.sync="editDialogVisible"
        width="30%"
        @close="editDialogVisible = false"
      >
        <!-- 内容主体区域 -->
        <el-form
          ref="editFormRef"
          :model="editForm"
          :rules="editFormRules"
          label-width="70px"
        >
          <el-form-item label="角色名" prop="roleName">
            <el-input v-model="editForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述" prop="roleDesc">
            <el-input type="textarea" v-model="editForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <!-- 底部区域 -->
        <span slot="footer" class="dialog-footer">
          <el-button @click="editDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="editRole">确 定</el-button>
        </span>
      </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 所有用户角色列表区域
      rolesList: [],
      setRightDialogVisible: false,
      //   所有权限列表
      rightsList: [],
      //   树形控件的属性绑定对象
      treeProps: {
        label: "authName",
        children: "children"
      },
      //   默认选中的结点id值
      defKeys: [],
      //   角色id
      roleId: "",
      addDialogVisible: false,
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      addFormRules: {
        roleName: [
          {
            required: true,
            message: "请输入角色名",
            trigger: "blur"
          }
        ]
      },
      editDialogVisible: false,
      editForm: {
        roleName: '',
        roleDesc: ''
      },
      editFormRules: {
        roleName: [
          {
            required: true,
            message: "请输入角色名",
            trigger: "blur"
          }
        ]
      },
      editRoleId: ''
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    //获取所有角色列表
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) {
        return this.$message.error("角色列表获取失败！");
      }

      this.rolesList = res.data;
      console.log(this.rolesList);
    },
    // 根据用户id删除对应的权限
    async removeRightById(role, rightId) {
      // 提示
      const confirmRes = await this.$confirm(
        "此操作将永久删除该文件, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        }
      ).catch(err => err);
      if (confirmRes !== "confirm") {
        return this.$message.info("取消删除用户权限！");
      }
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );
      if (res.meta.status !== 200) {
        return this.$message.error("取消权限失败！");
      }
      //   this.getRolesList();
      role.children = res.data;
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id;
      // 获取所有权限数据
      const { data: res } = await this.$http.get("rights/tree");

      if (res.meta.status !== 200) {
        return this.$message.error("获取权限列表失败！");
      }
      this.rightsList = res.data;
      this.getLeafKeys(role, this.defKeys);

      this.setRightDialogVisible = true;
    },
    // 通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys数组中
    getLeafKeys(node, arr) {
      if (!node.children) {
        return arr.push(node.id);
      }
      node.children.forEach(item => this.getLeafKeys(item, arr));
    },
    // 监听分配权限的对话框的关闭权限
    setRightDialogClosed() {
      this.defKeys = [];
    },
    // 点击为角色分配权限
    async allotRight() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ];
      //一英文,进行拼接
      const idStr = keys.join(",");
      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      );

      if (res.meta.status !== 200) {
        return this.$message.error("分配权限失败！");
      }
      this.$message.success("分配权限成功！");
      this.getRolesList();
      this.setRightDialogVisible = false;
    },
    async deleteRole(role) {
      //弹框提示是否删除该用户
      const confirmText = await this.$confirm(
        "此操作将永久删除该角色, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        }
      ).catch(err => err);
      //确定为：confirm；取消为：cancel
      if (confirmText !== "confirm") {
        return this.$message.info("已取消删除！");
      }

      const {data: res} = await this.$http.delete(`roles/${role.id}`)
      if (res.meta.status !== 200) {
        return this.$message.error("删除角色失败！");
      }
      this.$message.success("删除角色成功！");
      this.getRolesList()
    },
    addRole() {
      this.$refs.addFormRef.validate(async valid => {
        if(!valid) return;
         //可以发起真正的角色添加请求
        const { data: res } = await this.$http.post("roles", this.addForm);
        if (res.meta.status !== 201) {
          return this.$message.error("角色添加失败！");
        }
        this.$message.success("角色添加成功！");
        // 隐藏角色添加对话框
        this.addDialogVisible = false;
        // 重新获取角色列表数据
        this.getRolesList();
      })
    },
    editRole() {
      this.$refs.editFormRef.validate(async valid => {
        if(!valid) return;
        const { data: res } = await this.$http.put(`roles/${this.editRoleId}`, this.editForm);
        if (res.meta.status !== 200) {
          return this.$message.error("角色修改失败！");
        }
        this.$message.success("角色修改成功！");
        // 隐藏角色添加对话框
        this.editDialogVisible = false;
        // 重新获取角色列表数据
        this.getRolesList();
      })
    },
    async showEdit(role) {
      this.editRoleId = role.id;
      const {data: res} = await this.$http.get(`roles/${role.id}`)
      if(res.meta.status !== 200) {
        return this.$message.err(res.meta.msg);
      }
      this.editForm.roleName = res.data.roleName;
      this.editForm.roleDesc = res.data.roleDesc;
      this.editDialogVisible = true;
    }
  }
};
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
